<div dir="ltr">Hey,<div><br></div><div>We use the same setup on 3.3.1 (AWS with ELB doing TCP health check), but we get these error messages:</div><div><br></div><div><div>2015-03-16 17:38:05 ERROR: pid 3049: read_startup_packet: incorrect packet length (0)</div><div>2015-03-16 17:38:15 ERROR: pid 3049: read_startup_packet: incorrect packet length (0)</div><div>2015-03-16 17:38:25 ERROR: pid 3049: read_startup_packet: incorrect packet length (0)</div><div>2015-03-16 17:38:35 ERROR: pid 3049: read_startup_packet: incorrect packet length (0)</div></div><div><br></div><div>There is no backend crash I can see.</div><div><br></div><div><br></div><div>Cheers,</div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature"><div style="color:#b8276a;font:bold 14px Arial,Helvetica,sans-serif">
<br>
<span style="color:#323b62">James Sewell,</span><br>
<span style="color:#a9a9a9"><span style="font:12px Arial,Helvetica,sans-serif">PostgreSQL Team Lead / Solutions Architect </span></span><br>
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<br><div class="gmail_quote">On Tue, Mar 17, 2015 at 10:28 AM, Tatsuo Ishii <span dir="ltr"><<a href="mailto:ishii@postgresql.org" target="_blank">ishii@postgresql.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I guess pgpool-II complains that EC2 Elastic Load Balancer does not<br>
disconnect the session in a grace manner. As far as I know, EC2<br>
Elastic Load Balancer supports HTTP/HTTPS but does not support the<br>
PostgreSQL protocol. So I think there is not too much that pgpool-II<br>
can do.<br>
<br>
Best regards,<br>
--<br>
Tatsuo Ishii<br>
SRA OSS, Inc. Japan<br>
English: <a href="http://www.sraoss.co.jp/index_en.php" target="_blank">http://www.sraoss.co.jp/index_en.php</a><br>
Japanese:<a href="http://www.sraoss.co.jp" target="_blank">http://www.sraoss.co.jp</a><br>
<span class=""><br>
> Hi all,<br>
><br>
> I’m running pgPool 3.4.1 on a pair of CentOS 6.6 boxes at AWS, and I have an EC2 Elastic Load Balancer configured to balance requests between them. I have health checks set up on the load balancer, and I’ve noticed that every time I get a health check, the pgPool worker process that services that request dies. Here’s an excerpt from the log:<br>
><br>
> pgpool[389]: [951-2] 2015-03-16 18:14:36: pid 389: DETAIL: EOF encountered with frontend<br>
> pgpool[27]: [749-1] 2015-03-16 18:14:36: pid 27: LOG: child process with pid: 389 exits with status 256<br>
> pgpool[27]: [750-1] 2015-03-16 18:14:36: pid 27: LOG: fork a new child process with pid: 480<br>
><br>
> pgpool[502]: [733-1] 2015-03-16 18:15:06: pid 502: FATAL: unable to read data from frontend<br>
> pgpool[502]: [733-2] 2015-03-16 18:15:06: pid 502: DETAIL: EOF encountered with frontend<br>
> pgpool[28]: [759-1] 2015-03-16 18:15:06: pid 28: LOG: child process with pid: 502 exits with status 256<br>
> pgpool[28]: [760-1] 2015-03-16 18:15:06: pid 28: LOG: fork a new child process with pid: 524<br>
><br>
</span>> This was happening every 30 seconds. When I change the health check to be every 5 minutes, the child process dying also moved to every 5 minutes. I don’t have a whole lot of control over the health check �#| it’s a TCP connection on the pgPool port.<br>
<span class="">><br>
> Has anybody seen something like this before?<br>
><br>
> Thanks,<br>
> Scott<br>
><br>
> SCOTT RANKIN<br>
> Vice President, Technology<br>
> Motus, LLC<br>
> Two Financial Center, 60 South Street, Boston, MA 02111<br>
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